Examples of AggregationClient

org.apache.hadoop.hbase.client.coprocessor.AggregationClient
This client class is for invoking the aggregate functions deployed on the Region Server side via the AggregateProtocol. This class will implement the supporting functionality for summing/processing the individual results obtained from the AggregateProtocol for each region.
This will serve as the client side handler for invoking the aggregate functions.
- start row < end row is an essential condition (if they are not {@link HConstants#EMPTY_BYTE_ARRAY})
- Column family can't be null. In case where multiple families are provided, an IOException will be thrown. An optional column qualifier can also be defined.
- For methods to find maximum, minimum, sum, rowcount, it returns the parameter type. For average and std, it returns a double value. For row count, it returns a long value.

Examples of org.apache.hadoop.hbase.client.coprocessor.AggregationClient

   * -1.
   * @throws Throwable
   */
  @Test
  public void testRowCountWithInvalidRange1() {
    AggregationClient aClient = new AggregationClient(conf);
    Scan scan = new Scan();
    scan.addColumn(TEST_FAMILY, TEST_QUALIFIER);
    scan.setStartRow(ROWS[5]);
    scan.setStopRow(ROWS[2]);


    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    long rowCount = -1;
    try {
      rowCount = aClient.rowCount(TEST_TABLE, ci, scan);
    } catch (Throwable e) {
      myLog.error("Exception thrown in the invalidRange method"
          + e.getStackTrace());
    }
    assertEquals(-1, rowCount);

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Examples of org.apache.hadoop.hbase.client.coprocessor.AggregationClient

   * non-null. The result should be 0, as it assumes a non-get query.
   * @throws Throwable
   */
  @Test
  public void testRowCountWithInvalidRange2() {
    AggregationClient aClient = new AggregationClient(conf);
    Scan scan = new Scan();
    scan.addColumn(TEST_FAMILY, TEST_QUALIFIER);
    scan.setStartRow(ROWS[5]);
    scan.setStopRow(ROWS[5]);


    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    long rowCount = -1;
    try {
      rowCount = aClient.rowCount(TEST_TABLE, ci, scan);
    } catch (Throwable e) {
      rowCount = 0;
    }
    assertEquals(0, rowCount);
  }

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Examples of org.apache.hadoop.hbase.client.coprocessor.AggregationClient

  /**
   * This should return a 0
   */
  @Test
  public void testRowCountWithNullCF() {
    AggregationClient aClient = new AggregationClient(conf);
    Scan scan = new Scan();
    scan.setStartRow(ROWS[5]);
    scan.setStopRow(ROWS[15]);
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    long rowCount = -1;
    try {
      rowCount = aClient.rowCount(TEST_TABLE, ci, scan);
    } catch (Throwable e) {
       rowCount = 0;
    }
    assertEquals(0, rowCount);
  }

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Examples of org.apache.hadoop.hbase.client.coprocessor.AggregationClient

    assertEquals(0, rowCount);
  }


  @Test
  public void testRowCountWithNullCQ() throws Throwable {
    AggregationClient aClient = new AggregationClient(conf);
    Scan scan = new Scan();
    scan.addFamily(TEST_FAMILY);
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    long rowCount = aClient.rowCount(TEST_TABLE, ci,
        scan);
    assertEquals(20, rowCount);
  }

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Examples of org.apache.hadoop.hbase.client.coprocessor.AggregationClient

    assertEquals(20, rowCount);
  }


  @Test
  public void testRowCountWithPrefixFilter() throws Throwable {
    AggregationClient aClient = new AggregationClient(conf);
    Scan scan = new Scan();
    scan.addColumn(TEST_FAMILY, TEST_QUALIFIER);
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    Filter f = new PrefixFilter(Bytes.toBytes("foo:bar"));
    scan.setFilter(f);
    long rowCount = aClient.rowCount(TEST_TABLE, ci,
        scan);
    assertEquals(0, rowCount);
  }

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Examples of org.apache.hadoop.hbase.client.coprocessor.AggregationClient

   * give max for the entire table.
   * @throws Throwable
   */
  @Test
  public void testMaxWithValidRange() throws Throwable {
    AggregationClient aClient = new AggregationClient(conf);
    Scan scan = new Scan();
    scan.addColumn(TEST_FAMILY, TEST_QUALIFIER);
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    long maximum = aClient.max(TEST_TABLE, ci, scan);
    assertEquals(19, maximum);
  }

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Examples of org.apache.hadoop.hbase.client.coprocessor.AggregationClient

  /**
   * @throws Throwable
   */
  @Test
  public void testMaxWithValidRange2() throws Throwable {
    AggregationClient aClient = new AggregationClient(conf);
    Scan scan = new Scan();
    scan.addColumn(TEST_FAMILY, TEST_QUALIFIER);
    scan.setStartRow(ROWS[5]);
    scan.setStopRow(ROWS[15]);
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    long max = aClient.max(TEST_TABLE, ci, scan);
    assertEquals(14, max);
  }

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Examples of org.apache.hadoop.hbase.client.coprocessor.AggregationClient

    assertEquals(14, max);
  }


  @Test
  public void testMaxWithValidRangeWithNoCQ() throws Throwable {
    AggregationClient aClient = new AggregationClient(conf);
    Scan scan = new Scan();
    scan.addFamily(TEST_FAMILY);
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    long maximum = aClient.max(TEST_TABLE, ci, scan);
    assertEquals(190, maximum);
  }

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Examples of org.apache.hadoop.hbase.client.coprocessor.AggregationClient

    assertEquals(190, maximum);
  }


  @Test
  public void testMaxWithValidRange2WithNoCQ() throws Throwable {
    AggregationClient aClient = new AggregationClient(conf);
    Scan scan = new Scan();
    scan.addFamily(TEST_FAMILY);
    scan.setStartRow(ROWS[6]);
    scan.setStopRow(ROWS[7]);
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    long max = aClient.max(TEST_TABLE, ci, scan);
    assertEquals(60, max);
  }

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Examples of org.apache.hadoop.hbase.client.coprocessor.AggregationClient

    assertEquals(60, max);
  }


  @Test
  public void testMaxWithValidRangeWithNullCF() {
    AggregationClient aClient = new AggregationClient(conf);
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    Scan scan = new Scan();
    Long max = null;
    try {
      max = aClient.max(TEST_TABLE, ci, scan);
    } catch (Throwable e) {
      max = null;
    }
    assertEquals(null, max);// CP will throw an IOException about the
    // null column family, and max will be set to 0

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